Paul Edward Mills, 46, of Thurgoona, will appear in the District Court in Albury in April for sentencing on the indictable offences.

He pleaded guilty to using a carriage service to procure a person under 16, using a carriage service to transmit indecent communication to someone under 16 and having child abuse material.

Six other charges against him were withdrawn.

The court has previously heard Australian authorities began investigating him in May last year soon after a tip-off from US detectives about an “inappropriate conversation” with a girl, 15, in Illinois.

Officers from the child exploitation unit posed as a sexually naive girl, 14, and began online communications with Mills.

Mills, a music teacher, used the social network name “Mick Horny” and his profile picture was a penis.

He asked sexually inappropriate and explicit questions online on June 28.

Mills made contact twice online at 5.01pm and 6.35pm before a phone call was made at 7.14pm.